Sister passed out on floor..cant wake her.?

My sister stupidly decided to drink tonight, vodka I think it was. Anyhow, she's been sick already and passed out on bathroom floor, iv tried to wake her but she's none responsive, she is breathing though. I've put her on her stomach/side so she don't choke. Its the fact that she just won't wake up that slightly worries me, is it just the drink, and is there anything else I can do? Thanks in advance.